We demonstrate the ability to trap, levitate, and orient single anisometric nanoscale objects wit... more We demonstrate the ability to trap, levitate, and orient single anisometric nanoscale objects with high angular precision in a fluid. An electrostatic fluidic trap confines a spherical object at a spatial location defined by the minimum of the electrostatic system free energy. For an anisometric object and a potential well lacking angular symmetry, the system free energy can further strongly depend on the object's orientation in the trap. Engineering the morphology of the trap thus enables precise spatial and angular confinement of a single levitating nano-object, and the process can be massively parallelized. Since the physics of the trap depends strongly on the surface charge of the object, the method is insensitive to the object's dielectric function. Furthermore, levitation of the assembled objects renders them amenable to individual manipulation using externally applied optical, electrical, or hydrodynamic fields, raising prospects for reconfigurable chip-based nano-object assemblies.
An aperture-type near-field optical microscope based on hollow-pyramid cantilevered probes has be... more An aperture-type near-field optical microscope based on hollow-pyramid cantilevered probes has been developed and optimized for ultrafast nonlinear nanospectroscopy applications. These probes have many advantages for near-field microscopy such as higher throughput, ...
Numerical solution of the Poisson equation is a useful tool for reproducing electric fields in in... more Numerical solution of the Poisson equation is a useful tool for reproducing electric fields in inorganic semiconductor devices, where charge distribution, boundary conditions and material properties are well defined. This approach however fails in organic semiconductors for several ...
An aperture-type near-field optical microscope based on hollow-pyramid cantilevered probes has be... more An aperture-type near-field optical microscope based on hollow-pyramid cantilevered probes has been developed and optimized for ultrafast nonlinear nanospectroscopy applications. These probes have many advantages for near-field microscopy such as higher throughput, ...
Room temperature single molecule optics has had a profound impact on various fields such as bioph... more Room temperature single molecule optics has had a profound impact on various fields such as biophysics, material science and even quantum optics [1]. Due to the small absorption cross sections of single emitters at ambient conditions, direct absorption detection has ...
Abstract By combining confocal microscopy with electroreflectance spectroscopy we directly map el... more Abstract By combining confocal microscopy with electroreflectance spectroscopy we directly map electric field amplitude distribution between electrodes in a prototypical organic semiconductor device. We demonstrate this approach on a copper phthalocyanine ...
Abstract We demonstrate single-molecule detection sensitivity via conventional modulation-free tr... more Abstract We demonstrate single-molecule detection sensitivity via conventional modulation-free transmission microscopy. Room-temperature single-molecule absorption imaging achieved at different wavelengths set the path towards absorption spectroscopy at the ...
We demonstrate the ability to trap, levitate, and orient single anisometric nanoscale objects wit... more We demonstrate the ability to trap, levitate, and orient single anisometric nanoscale objects with high angular precision in a fluid. An electrostatic fluidic trap confines a spherical object at a spatial location defined by the minimum of the electrostatic system free energy. For an anisometric object and a potential well lacking angular symmetry, the system free energy can further strongly depend on the object's orientation in the trap. Engineering the morphology of the trap thus enables precise spatial and angular confinement of a single levitating nano-object, and the process can be massively parallelized. Since the physics of the trap depends strongly on the surface charge of the object, the method is insensitive to the object's dielectric function. Furthermore, levitation of the assembled objects renders them amenable to individual manipulation using externally applied optical, electrical, or hydrodynamic fields, raising prospects for reconfigurable chip-based nano-object assemblies.
An aperture-type near-field optical microscope based on hollow-pyramid cantilevered probes has be... more An aperture-type near-field optical microscope based on hollow-pyramid cantilevered probes has been developed and optimized for ultrafast nonlinear nanospectroscopy applications. These probes have many advantages for near-field microscopy such as higher throughput, ...
Numerical solution of the Poisson equation is a useful tool for reproducing electric fields in in... more Numerical solution of the Poisson equation is a useful tool for reproducing electric fields in inorganic semiconductor devices, where charge distribution, boundary conditions and material properties are well defined. This approach however fails in organic semiconductors for several ...
An aperture-type near-field optical microscope based on hollow-pyramid cantilevered probes has be... more An aperture-type near-field optical microscope based on hollow-pyramid cantilevered probes has been developed and optimized for ultrafast nonlinear nanospectroscopy applications. These probes have many advantages for near-field microscopy such as higher throughput, ...
Room temperature single molecule optics has had a profound impact on various fields such as bioph... more Room temperature single molecule optics has had a profound impact on various fields such as biophysics, material science and even quantum optics [1]. Due to the small absorption cross sections of single emitters at ambient conditions, direct absorption detection has ...
Abstract By combining confocal microscopy with electroreflectance spectroscopy we directly map el... more Abstract By combining confocal microscopy with electroreflectance spectroscopy we directly map electric field amplitude distribution between electrodes in a prototypical organic semiconductor device. We demonstrate this approach on a copper phthalocyanine ...
Abstract We demonstrate single-molecule detection sensitivity via conventional modulation-free tr... more Abstract We demonstrate single-molecule detection sensitivity via conventional modulation-free transmission microscopy. Room-temperature single-molecule absorption imaging achieved at different wavelengths set the path towards absorption spectroscopy at the ...
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